Segment Information (Segment Income Statement Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,970	$ 7,571	$ 23,618	$ 22,699
Cost of services and products	3,201	2,924	9,687	8,843
Selling, general and administration expense	6,015	4,726	16,664	15,686
Loss on disposal, restructuring costs and other special charges		600		700
Depreciation and amortization	891	931	3,383	2,753
Total operating expenses	10,107	9,181	29,734	27,982
Operating Loss	(2,137)	(1,610)	(6,116)	(5,283)
Interest income (expense), net	(2)	20	10	(173)
Income from investment				52,373
Other income, net	25	(4)	1,515	23
(Loss) income before income taxes	(2,114)	(1,594)	(4,591)	46,940
Unified Communications [Member]
Segment Reporting Information [Line Items]
Operating Revenues	4,718	4,308	13,703	12,753
Cost of services and products	2,268	1,923	6,769	5,838
Selling, general and administration expense	3,624	3,048	10,361	10,059
Loss on disposal, restructuring costs and other special charges		336		392
Depreciation and amortization	529	546	2,256	1,606
Total operating expenses	6,421	5,853	19,386	17,895
Operating Loss	(1,703)	(1,545)	(5,683)	(5,142)
Telephone [Member]
Segment Reporting Information [Line Items]
Operating Revenues	3,252	3,263	9,915	9,946
Cost of services and products	933	1,001	2,918	3,005
Selling, general and administration expense	2,391	1,678	6,303	5,627
Loss on disposal, restructuring costs and other special charges		264		308
Depreciation and amortization	362	385	1,127	1,147
Total operating expenses	3,686	3,328	10,348	10,087
Operating Loss	$ (434)	$ (65)	$ (433)	$ (141)